Wcdma specifications

  • Tuesday, August 2 at 6:01PM
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Akash
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  • 2850

Frequency band:1920 MHz -1980 MHz and 2110 MHz - 2170 MHz (Frequency Division Duplex) UL and DL.
Minimum frequency band required: ~ 2x5MHz
Frequency re-use: 1
Carrier Spacing: 4.4MHz - 5.2 MHz
Maximum number of (voice) channels on 2x5MHz: ~196 (spreading factor 256 UL, AMR 7.95kbps) / ~98 (spreading factor 128 UL, AMR 12.2kbps) 
Voice coding: AMR codecs (4.75 kHz - 12.2 kHz, GSM EFR=12.2 kHz) and SID (1.8 kHz)
Channel coding: Convolutional coding, Turbo code for high rate data
Duplexer needed (190MHz separation), Asymmetric connection supported
Tx/Rx isolation: MS: 55dB, BS: 80dB
Receiver: Rake
Receiver sensitivity: Node B: -121dBm, Mobile -117dBm at BER of 10-3
Data type: Packet and circuit switch
Modulation: QPSK
Pulse shaping: Root raised cosine, roll-off = 0.22
Chip rate: 3.84 Mcps
Channel raster: 200 kHz
Maximum user data rate (Physical channel): ~ 2.3Mbps (spreading factor 4, parallel codes (3 DL / 6 UL), 1/2 rate coding), but interference limited.
Maximum user data rate (Offered): 384 kbps (year 2002), higher rates ( ~ 2 Mbps) in the near future. HSPDA will offer data speeds up to 8-10 Mbps (and 20 Mbps for MIMO systems)
Channel bit rate: 5.76Mbps
Frame length: 10ms (38400 chips)
Number of slots / frame: 15
Number of chips / slot: 2560 chips
Handovers: Soft, Softer, (interfrequency: Hard)
Power control period: Time slot = 1500 Hz rate
Power control step size: 0.5, 1, 1.5 and 2 dB (Variable)
Power control range: UL 80dB, DL 30dB
Mobile peak power: Power class 1: +33 dBm (+1dB/-3dB) = 2W; class 2 +27 dBm, class 3 +24 dBm, class 4 +21 dBm
Number of unique base station identification codes: 512 / frequency
Physical layer spreading factors: 4 ... 256 UL, 4 ... 512 DL



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